Difference between revisions of "Neighbor Discovery Cisco IOS"
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| + | =Neighbors= | ||
Neighbor discovery. Mapping between IPv6 address and Link-layer Address. (MAC-address). Notice in the ouput below '''REACH''' means that the Node can be reached. '''STALE''' means the Node have not been reached the last 30 minuttes. | Neighbor discovery. Mapping between IPv6 address and Link-layer Address. (MAC-address). Notice in the ouput below '''REACH''' means that the Node can be reached. '''STALE''' means the Node have not been reached the last 30 minuttes. | ||
| + | ==Showing Neighbors== | ||
<source lang=cli> | <source lang=cli> | ||
Campus1#<input>show ipv6 neighbors</input> | Campus1#<input>show ipv6 neighbors</input> | ||
| Line 19: | Line 21: | ||
<notice>...Output omitted...</notice> | <notice>...Output omitted...</notice> | ||
</source> | </source> | ||
| − | =Adding a static Neighbor entry= | + | ==Adding a static Neighbor entry== |
Some IPv6 traffic generators don't respond to ND - Neighbor Discovery. | Some IPv6 traffic generators don't respond to ND - Neighbor Discovery. | ||
<source lang=cli> | <source lang=cli> | ||
| Line 29: | Line 31: | ||
</input> | </input> | ||
</source> | </source> | ||
| + | ==Removing Neighbor entries== | ||
| + | ===Removing all neighbors=== | ||
| + | <source lang=cli> | ||
| + | Heimdal#<input>clear ipv6 neighbors</input> | ||
| + | </source> | ||
| + | ===Removing Neighbors on a specific Interface=== | ||
| + | <source lang=cli> | ||
| + | Heimdal#<input>clear ipv6 neighbors gigabitEthernet 0/7</input> | ||
| + | </source> | ||
| + | ===Removing a specific Neighbor=== | ||
| + | <source lang=cli> | ||
| + | Heimdal#<input>clear ipv6 neighbors gigabitEthernet 0/7 2001:fd56:5878:4::56fe</input> | ||
| + | </source> | ||
| + | |||
| + | =NDP timer tuning= | ||
| + | <source lang=cli> | ||
| + | Heimdal#<input>show ipv6 interface vlan 28</input> | ||
| + | Vlan28 is up, line protocol is up | ||
| + | IPv6 is enabled, link-local address is FE80::219:E7FF:FE51:8C9 | ||
| + | No Virtual link-local address(es): | ||
| + | Description: TKUVLAN_308 | ||
| + | Global unicast address(es): | ||
| + | 2001:16D8:DD85:146::1, subnet is 2001:16D8:DD85:146::/64 | ||
| + | Joined group address(es): | ||
| + | FF02::1 | ||
| + | FF02::2 | ||
| + | FF02::5 | ||
| + | FF02::6 | ||
| + | FF02::1:FF00:1 | ||
| + | FF02::1:FF51:8C9 | ||
| + | MTU is 1500 bytes | ||
| + | ICMP error messages limited to one every 100 milliseconds | ||
| + | ICMP redirects are enabled | ||
| + | ICMP unreachables are sent | ||
| + | Output features: Check hwidb | ||
| + | ND DAD is enabled, number of DAD attempts: 1 | ||
| + | ND reachable time is 30000 milliseconds (using 35938) | ||
| + | ND advertised reachable time is 0 (unspecified) | ||
| + | ND advertised retransmit interval is 1000 milliseconds | ||
| + | ND router advertisements are sent every 200 seconds | ||
| + | ND router advertisements live for 1800 seconds | ||
| + | ND advertised default router preference is Medium | ||
| + | Hosts use stateless autoconfig for addresses. | ||
| + | </input> | ||
| + | ==NS-interval== | ||
| + | ;Neighbor Solicitation Interval: Time in milliseconds between solicitation messages between neighbors. | ||
{{Source cli}} | {{Source cli}} | ||
[[Category:IPv6]][[Category:CiscoIPv6]] | [[Category:IPv6]][[Category:CiscoIPv6]] | ||
Revision as of 13:09, 2 June 2011
Contents
Neighbors
Neighbor discovery. Mapping between IPv6 address and Link-layer Address. (MAC-address). Notice in the ouput below REACH means that the Node can be reached. STALE means the Node have not been reached the last 30 minuttes.
Showing Neighbors
Campus1#<input>show ipv6 neighbors</input>
IPv6 Address Age Link-layer Addr State Interface
FE80::216:76FF:FE9F:FEF6 3 0016.769f.fef6 <notice>REACH</notice> Vl139
FE80::8555:196A:5ACC:1976 4 0026.c7d3.5140 <notice>STALE</notice> Vl139
FE80::7AD6:F0FF:FE03:39A2 5 78d6.f003.39a2 STALE Vl139
FE80::128C:CFFF:FE96:F76F 4 108c.cf96.f76f STALE Vl1
2001:16D8:DD85:139:9DAC:27C8:B159:1755 5 0024.d717.2b40 STALE Vl139
2001:16D8:DD85:139:20C:29FF:FE36:45B1 4 000c.2936.45b1 STALE Vl139
FE80::385E:C561:FCF9:7D57 3 0050.568b.0004 STALE Vl139
FE80::6D18:8558:E775:3AA3 0 b870.f473.0d6d REACH Vl139
FE80::20C:29FF:FEBC:D8D7 3 000c.29bc.d8d7 STALE Vl139
2001:16D8:DD85:139:B575:391E:D0EB:65F9 3 0050.568b.0008 STALE Vl139
FE80::14D0:4280:97DA:1817 5 0024.2bce.819a STALE Vl139
FE80::E570:A9A7:9163:7829 0 1c4b.d676.6dc1 REACH Vl139
FE80::7DF9:81D5:2C78:70F3 3 000c.2940.d4de STALE Vl139
2001:16D8:DD85:139:754F:E641:1227:9D65 5 6c62.6d28.3cd2 STALE Vl139
<notice>...Output omitted...</notice>Adding a static Neighbor entry
Some IPv6 traffic generators don't respond to ND - Neighbor Discovery.
R3(config)#<input>ipv6 neighbor 2001:16D8:DD85:140::77 fastethernet0/1 0010.dead.beef</input>
R3(config>#<input><CTRL-Z></input>
R3#<input>show ipv6 neighbors fastEthernet 0/1</input>
IPv6 Address Age Link-layer Addr State Interface
2001:16D8:DD85:140::77 - 0010.dead.beef REACH Fa0/1
</input>Removing Neighbor entries
Removing all neighbors
Heimdal#<input>clear ipv6 neighbors</input>Removing Neighbors on a specific Interface
Heimdal#<input>clear ipv6 neighbors gigabitEthernet 0/7</input>Removing a specific Neighbor
Heimdal#<input>clear ipv6 neighbors gigabitEthernet 0/7 2001:fd56:5878:4::56fe</input>NDP timer tuning
<source lang=cli> Heimdal#<input>show ipv6 interface vlan 28</input> Vlan28 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::219:E7FF:FE51:8C9 No Virtual link-local address(es): Description: TKUVLAN_308 Global unicast address(es): 2001:16D8:DD85:146::1, subnet is 2001:16D8:DD85:146::/64 Joined group address(es): FF02::1 FF02::2 FF02::5 FF02::6 FF02::1:FF00:1 FF02::1:FF51:8C9 MTU is 1500 bytes ICMP error messages limited to one every 100 milliseconds ICMP redirects are enabled ICMP unreachables are sent Output features: Check hwidb ND DAD is enabled, number of DAD attempts: 1 ND reachable time is 30000 milliseconds (using 35938) ND advertised reachable time is 0 (unspecified) ND advertised retransmit interval is 1000 milliseconds ND router advertisements are sent every 200 seconds ND router advertisements live for 1800 seconds ND advertised default router preference is Medium Hosts use stateless autoconfig for addresses.
</input>
NS-interval
- Neighbor Solicitation Interval
- Time in milliseconds between solicitation messages between neighbors.